Has Anyone Mid Frame-mounted A Subaru/Mits/Honda/Tanaka Engine?

5

5-7HEAVEN

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With the advent of the SBP shift kit, has anyone frame-mounted any of these engines and run them through the bike's gears? Scooterguy mounts his engines a little higher in the frame. I'm thinking a little lower, nearer to the pedals.

Midframe seems like the next combination to use. The chain length would be short, and a 5:1 gearbox would bring the gearing up to speed. High-performance expansion pipes would have more room to clear the bike's frame.

Anyone doing this?
 
It Might Be Possible.

I've been in contact with Pablo and Jim at SBP. They MIGHT have all the parts I need to frame-mount my Mitsubishi/Tanaka/GP460 engine and run thru the gears. Jerry at Scooterguy supplied me the chainrings, freewheel, #25 chain and 5:1 gearbox. Thatsdax.com is shipping my 1/2" jackshaft axle, another vendor has my sprockets on the way. Bearings and collars are from BMP friction kit.

Waiting for parts to arrive. School finals are next week, so I should have time after that to work on my bikes.
 
I've been dreaming about a setup like this.. Really looking forward to see what happens.
 
I've hit a snag.:sick:

The #25 sprockets arrived today. They do not work with the chain that scooterguy supplied. I checked Scooterguy's website, and he uses 8mm chain and sprockets!

Doh!:sick:

My mistake. I thought scooterguy's drive was #25, but it's 8mm drive...including the gearbox sprocket, which I won't be able to use.

I COULD fab a plate onto the SBP motor mount and run the 8mm chain directly from the 5:1 gearbox. That way, the engine will fit, but stick out as much as the scooterguy setup, only lower.

I DID see a#25 sprocket at an online website, with 6-pinion splined-bore for the 5:1 gearbox. It's 15-teeth to match a 15t on the jackshaft. now I need to locate a 15t with 1/2" bore that'll run an 8mm chain. If I DO find that sprocket, I'll be able to use the SBP jackshaft and move the engine inward for better clearance and balance.

If I don't utilize the #25 sprockets, jackshaft and bearings, I'll use it on my other project, which is:

http://motoredbikes.com/showthread.php?p=270381#post270381
 
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Thanks, man. Exactly what I was looking for. Right now, I have a Tanaka 47R engine on a Scooterguy frame mount. The next design change might be to move the engine into the frame. Sadly, the engine won't fit into this bike's frame, so it'll have to be another bike, another time.
 
no problem, have you seen this as well?

http://motorbicycling.com/attachments/f42/7702d1240412169-new-build-pocket-bike-motor-dsc06370.jpg

im intrested also in a in frame mounted system that drives the crank for a robin subaru eho35

but cant think of a gearbox, only this http://www.funbikes.co.uk/Midi_Moto_Gearbox(324).aspx
but i dont think the reduction is sufficient.

any chance of a drawing?

from your mention of jackshaft i sketched this (please see attached)

i Think ill go for something like this with a 5:1 gearbox

http://www.bimoto.pl/index.php?s=1&l=en

dont give up
 

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Looks like a sharp install. Bike might need a larger rear sprocket, though, if that's a pocketbike engine and gearbox.

Your drawing looks very similar to Scooterguy drive kit, which is what I'm using. A 5:1 gearbox and SBP shift kit might work perfectly for you.

http://thatsdax.com/ENGINE_KIT_PARTS_PAGE_4.html

JMO, along with the SBP kit, this 5:1 gearbox is the key component that makes the utility engine-frame mount possible.
 
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A 5:1 gearbox and SBP shift kit might work perfectly for you.

yeap i think so just need to find a way of making it stealth people are pretty hostile to them where i am :(

do you have a picture of your latest setup?

p.s. what is a JMO?

:)
 
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